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Old 02-09-2015, 10:01 PM
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Tru Lock Differentials

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Question for the experts. I got a JKUS, came standard with Dana 44 HD & 30 axles in 3.21, with the 3.73 upgrade. The Rubicon brochure says that the Dana Axles come with Tru Lock locking differentials. Would that mean my JK with the Dana Axles also has locking differentials??? Anyone....

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Old 02-09-2015, 10:07 PM   #2
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The rear should have the BLD. Brake lock diff. It is suppose to act like a locker. But it's not a true locker. The front should be open.

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Old 02-09-2015, 10:09 PM   #3
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No. Only Rubicons come with locking diffs from the factory. Rubicons have D44's front and rear. All models have rear D44's, but have front D30's, except Rubicons. You have the optional 3.73's which is a good gear ratio to have.
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Old 02-09-2015, 10:14 PM   #4
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Question for the experts. I got a JKUS, came standard with Dana 44 HD & 30 axles in 3.21, with the 3.73 upgrade. The Rubicon brochure says that the Dana Axles come with Tru Lock locking differentials. Would that mean my JK with the Dana Axles also has locking differentials??? Anyone....
No. The brochure (as pictured) is talking about Dana 44 Rubicon axles. You do not have lockers in either of your differentials on your Sport.
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Old 02-09-2015, 10:21 PM
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So I want some lockers. What's the best aftermarket install I should purchase? And can they be installed on these stock axles?
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Old 02-09-2015, 10:44 PM   #6
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So I want some lockers. What's the best aftermarket install I should purchase? And can they be installed on these stock axles?
Gonna get a few different answers. ARB will be one of them. Go with a reputable selectable locker. That would be my best choice.
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Old 02-09-2015, 10:48 PM   #7
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ARB is good if you dont mind the extra expense, weight and things to go wrong with an on-board air system
I just had an Eaton eLocker installed in my rear and love it.
You could also go with something cheaper like a "lunchbox" in the front which is on/locked any time you are in 4WD (seriously messing with your steering).

I prefer the "selectable" type like ARB or e(lectric)Locker .. and went with the eLocker.

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